EP3461062B1 - Stromumwandlungsvorrichtung - Google Patents

Stromumwandlungsvorrichtung Download PDF

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Publication number
EP3461062B1
EP3461062B1 EP17192713.0A EP17192713A EP3461062B1 EP 3461062 B1 EP3461062 B1 EP 3461062B1 EP 17192713 A EP17192713 A EP 17192713A EP 3461062 B1 EP3461062 B1 EP 3461062B1
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EP
European Patent Office
Prior art keywords
power
data transmission
transmission link
voltage
delivery apparatus
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EP17192713.0A
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English (en)
French (fr)
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EP3461062A1 (de
Inventor
Jun Yan
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General Electric Technology GmbH
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General Electric Technology GmbH
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Publication date
Application filed by General Electric Technology GmbH filed Critical General Electric Technology GmbH
Priority to EP17192713.0A priority Critical patent/EP3461062B1/de
Priority to US16/648,587 priority patent/US11070393B2/en
Priority to PCT/EP2018/074126 priority patent/WO2019057518A1/en
Publication of EP3461062A1 publication Critical patent/EP3461062A1/de
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Publication of EP3461062B1 publication Critical patent/EP3461062B1/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40045—Details regarding the feeding of energy to the node from the bus

Definitions

  • This invention relates to a power delivery apparatus for supplying electric power from a power source device to a power sink device via a data transmission link.
  • Patent document EP3024172 A1 relates to a Power over Dataline, PoDL system which includes a Power sourcing Equipment, PSE, connected via a wire pair to a Powered Device, PD, where differential data and DC power are transmitted over the same wire pair.
  • PSE Power sourcing Equipment
  • PD Powered Device
  • the PSE periodically tests that the PD load resistance is equal to or less than the "maintain power signature" resistor value. If the PD load resistance is equal to or less than the "maintain power signature" resistor value, the PSE assumes the PD has not been disconnected and continue supplying power to the PD.
  • Patent document US2009/210725 A1 relates to Powers over Ethernet (POE) communication systems, wherein the PSE further includes a PSE controller that controls the DC voltage supply, e.g., based on a classification load provided by the PD (based on the POE classification of the PD) and/or based on a determined length of a communications link connecting the PD and PSE.
  • PSE Powers over Ethernet
  • each PSE needs to have a back off algorithm where it does not conduct IEEE discovery for a period of time so that they do not both attempt to determine that a valid PD is attached and that it should power up to provide inline power to the PD.
  • the PSE still supplies low DC current to permit the biasing of the diodes above a few volts.
  • This PD is high-impedance allowing the easy discovery of the conventional IEEE 802.3af 25k identity network in the PD or third network device.
  • a power delivery apparatus comprising a power source device, a power sink device and a data transmission link, the power source device connected to one end of the data transmission link, the power sink device selectively connectable to another end of the data transmission link, the data transmission link configured to permit transmission of data between the power source device and the power sink device when the power sink device is connected to the data transmission link, wherein the power source device is configured to apply a periodic sensing voltage to the data transmission link, the power delivery apparatus further including a sensing device configured to detect, via the application of the periodic sensing voltage to the data transmission link, whether the power sink device is connected to the data transmission link, and the power source device is configured so that, in response to the power sink device being detected as connected to the data transmission link, the power source device applies a power supply voltage to the data transmission link to supply electric power to the power sink device via the data transmission link so as to enable a normal operation of the power sink device, and characterized in that the periodic sensing voltage is lower than the power supply voltage.
  • the configuration of the power delivery apparatus of the invention allows the automatic sensing of the connection of the power sink device and the subsequent transmission of electric power to enable the normal operation of the power sink device. This beneficially removes the need for the power sink device to be provided with a dedicated power supply, which not only improves the plug and play capability of the power sink device but also reduces the amount of hardware required for the functioning of the power sink device.
  • the automatic sensing feature of the power delivery apparatus is aided by the use of the periodic sensing voltage in the detection of the connectivity of the power sink device to the data transmission link.
  • the use of the periodic sensing voltage not only reduces the amount of power consumed by the automatic sensing feature but also reduces the risk of electrical shock to a user that comes into contact with the data transmission link, without any significant adverse impact on the detection capability of the sensing device.
  • the power source device may include a built-in electrical source or may be connected to an external electrical source, whereby the electrical source is configured to enable the power source device to apply the periodic sensing voltage to the data transmission link.
  • an electrical source may be in the form of, for example, a current source.
  • the power source device may include a built-in electrical source or may be connected to an external electrical source, whereby the power source is configured to enable the power source device to apply the power supply voltage to the data transmission link.
  • an electrical source may be in the form of, for example, a voltage source.
  • the sensing device may be configured to detect, via the application of the periodic sensing voltage to the data transmission link, a signature resistance of the power sink device when the power sink device is connected to the data transmission link. This provides a reliable means of detecting the connectivity of the power sink device to the data transmission link.
  • the power source device may include a voltage compensation circuit configured to selectively modify the power supply voltage so as to provide a modified power supply voltage to compensate for a voltage drop on the data transmission link.
  • the provision of the voltage compensation circuit enables the power source device to compensate for power losses in the data transmission link to ensure delivery of sufficient electric power to the power sink device, thus removing the need for a voltage compensation circuit in the power sink device.
  • the power source device may be configured to receive information (e.g. a voltage) corresponding to a length of the data transmission link and to process the information to determine the modified power supply voltage.
  • information e.g. a voltage
  • the voltage compensation circuit may work with a range of lengths of the data transmission link in order to ensure the application of a suitable power supply voltage.
  • the power source device may include a voltage boost device configured to selectively boost the power supply voltage.
  • a voltage boost device may be in the form of, for example, a boost converter.
  • the inclusion of the voltage boost device in the power source device increases the voltage range of the power supply voltage, which obviates the need to use a high power supply voltage in combination with a voltage buck circuit in the power sink device.
  • the voltage boost device when employing the use of the voltage compensation circuit, may be configured to selectively boost the power supply voltage so as to provide the modified power supply voltage. This provides a reliable means for providing the modified power supply voltage for voltage drop compensation purposes.
  • the periodic sensing voltage is lower than the power supply voltage.
  • the periodic sensing voltage may be at least an order of magnitude lower than the power supply voltage.
  • the configuration of the power delivery apparatus of the invention permits the use of such a low periodic sensing voltage without any significant adverse impact on the detection capability of the sensing device.
  • the invention can be used in any application which requires delivery of power from a power source device to a power sink device via a data transmission link.
  • the data transmission link may be, but is not limited to, any one of: an Ethernet data transmission link, a Registered Jack 45 (RJ45) data transmission link, a Universal Serial Bus (USB) data transmission link, a Serial AT Attachment (SATA) data transmission link, and a High Definition Multimedia Interface (HDMI) data transmission link.
  • RJ45 Registered Jack 45
  • USB Universal Serial Bus
  • SATA Serial AT Attachment
  • HDMI High Definition Multimedia Interface
  • the invention can be used across a wide range of applications, examples of which are described as follows.
  • the power source device may be a switching controller
  • the power sink device may be a human-machine interface device
  • the switching controller may be an intelligent electronic device.
  • the invention may be applied to a power distribution network which comprises the power delivery apparatus according to any of the embodiments described hereinabove.
  • a power distribution network may include a substation controller and an input-output module, wherein the substation controller is configured as the power source device and wherein the input-output module is configured as the power sink device.
  • the input-output module may be a distributed or remote input-output module.
  • a power delivery apparatus according to an embodiment of the invention is shown in Figure 1 and is designated generally by the reference numeral 20.
  • the power delivery apparatus 20 comprises a power source device, a power sink device, and a data transmission link.
  • the power source device is configured for connection to input pins at one end of the data transmission link
  • the power sink device is configured for connection to output pins at another end of the data transmission link.
  • the power source device is in the exemplary form of a substation controller 22
  • the power sink device is in the exemplary form of an input-output (IO) module 24
  • the data transmission link is in the exemplary form of an Ethernet cable 26 which is configured to permit transmission of data between the substation controller 22 and the power sink device when the substation controller 22 and power sink device are interconnected via the Ethernet cable 26.
  • FIG. 2 shows the structure of the substation controller 22.
  • the substation controller 22 includes a control unit in the exemplary form of a host processor 28, a detection drive in the exemplary form of a current source 30, a pulse width modulation (PWM) voltage drive 32, a sensing device in the exemplary form of a voltage sensor 34, and a voltage boost device in the exemplary form of a boost DC-DC converter 36.
  • PWM pulse width modulation
  • the host processor 28 controls the current source to generate a fixed width periodic current pulse 38 for supply to the Ethernet cable 26.
  • the fixed width periodic current pulse 38 is defined so that it consists of a non-zero current applied for a duration of 2ms over a period of 1s and a zero current applied over the remainder of the period. This in turn results in the application of a periodic sensing voltage to the Ethernet cable 26 when it is connected to a load 40.
  • Figure 3 shows the periodic sensing voltage.
  • the voltage sensor 34 is configured to detect, via the application of the periodic sensing voltage to the Ethernet cable 26, whether the IO module 24 is connected to the other end of the Ethernet cable 26. In particular, when the periodic sensing voltage is applied to the Ethernet cable 26, the voltage sensor 34 is configured to detect a voltage 42 corresponding to the signature resistance of the IO module 24 when the IO module 24 is connected to the other end of the Ethernet cable 26.
  • the voltage sensor 34 When the voltage sensor 34 detects the voltage 42 corresponding to the signature resistance of the IO module 24, the voltage sensor 34 will communicate the successful detection of the connection between the IO module 24 and the Ethernet cable 26 to the host processor 28.
  • the host processor 28 will then control the PWM voltage drive 32 to supply a PWM voltage signal for driving the boost DC-DC converter, which is configured to receive an input voltage of 12V from an external voltage source 44.
  • the host processor 28 will also trigger the closure of a load switch in order to switch the boost DC-DC converter into circuit with the input pins of the Ethernet cable 26.
  • the closure of the load switch allows the boost DC-DC converter to supply power to the Ethernet cable 26.
  • the PWM voltage signal is defined so that the boost DC-DC converter generates an output voltage for supply to the Ethernet cable 26. In this manner the substation controller 22 applies a constant power supply voltage to the Ethernet cable 26 to supply electric power to the IO module 24 via the Ethernet cable 26, which enables the IO module 24 to carry out its normal operation.
  • the voltage 42 detected by the voltage sensor 34 will vary from the voltage 42 corresponding to the signature resistance of the IO module 24.
  • the voltage sensor 34 will then communicate the detection of the different load to the host processor 28.
  • the PWM voltage drive 32 is not controlled to provide a PWM voltage signal to the boost DC-DC converter 36, and the load switch is kept open (or opened if previously closed).
  • the use of the periodic sensing voltage therefore results in an improved power delivery apparatus 20 in terms of cost, safety and responsiveness.
  • the host processor 28 may modify the duty cycle of the PWM voltage signal to enable the boost DC-DC converter to modify the input voltage so that a boosted constant power supply voltage, e.g. 13V to 21V, is applied to the Ethernet cable 26 to increase the electric power supplied via the Ethernet cable 26.
  • Figure 4 illustrates the ability of the boost DC-DC converter 36 to apply different boosted power supply voltages to the Ethernet cable 26.
  • the ability to boost the power supply voltage in the above manner enables the supply of electric power to the IO module 24 by the power delivery apparatus 20 to be responsive to a change in load connected to the other end of the Ethernet cable 26, thus ensuring economic and reliable delivery of electric power.
  • the ability to boost the power supply voltage in the above manner enables the boost DC-DC converter 36 to be operated as a voltage compensation circuit.
  • This enables the supply of electric power to the IO module 24 to take into account power losses arising from a voltage drop on the Ethernet cable 26 during the transmission of electric power via the Ethernet cable 26, thus ensuring the delivery of sufficient electric power to the IO module 24.
  • Such a feature is particularly useful when the IO module 24 is located at a remote location relative to the substation controller 22 (as seen in communications networks and power distribution networks), thereby requiring a long distance connection between the substation controller 22 and the IO module 24.
  • the host processor 28 includes an analogue-to-digital input terminal which is configured to receive an input voltage from the Ethernet cable 26, whereby the received input voltage varies with the length of the Ethernet cable 26.
  • Figure 5 illustrates the variation of the received input voltage 46,48,50,52 with different lengths of the Ethernet cable 26. The host processor 26 then compares the received input voltage with a look-up table to determine the level of boost required for the power supply voltage and thereby control the PWM voltage drive 32 accordingly.
  • the provision of the boost DC-DC converter 36 in the substation controller 22 increases the voltage range capability of the power delivery apparatus 20, which enables it to provide safe and efficient power delivery across a wide range of configurations based on different cable lengths and different types of IO modules. This is in contrast to conventional Power over Ethernet (PoE) setups based on the use of a fixed power supply voltage and requiring compliance with specific power delivery standards, which renders the conventional PoE setups incompatible for use with certain cable lengths and certain types of IO modules.
  • PoE Power over Ethernet
  • the substation controller 22, the IO module 24 and the Ethernet cable 26 of the embodiment shown are merely chosen to help illustrate the working of the invention, and may be respectively replaced by other types of power source device, power sink device and data transmission link.
  • the power source device may be a switching controller (e.g. an intelligent electronic device) and the power sink device may be a human-machine interface device.
  • the IO module 24 may be a distributed or remote input-output module.
  • the Ethernet cable 26 in the embodiment shown may be replaced by, but is not limited to, another type of RJ45 cable, a USB cable, a SATA cable, and a HDMI cable.

Claims (13)

  1. Stromversorgungseinrichtung (20), umfassend eine Stromquellenvorrichtung (22), ein Stromsenkenvorrichtung (24) und eine Datenübertragungsverbindung (26), wobei die Stromquellenvorrichtung (22) mit einem Ende der Datenübertragungsverbindung (26) verbunden ist, wobei die Stromsenkenvorrichtung (24) wahlweise mit einem anderen Ende der Datenübertragungsverbindung (26) verbindbar ist, wobei die Datenübertragungsverbindung (26) eingerichtet ist, um eine Übertragung von Daten zwischen der Stromquellenvorrichtung (22) und der Stromsenkenvorrichtung (24) zuzulassen, wenn die Stromsenkenvorrichtung (24) mit der Datenübertragungsverbindung (26) verbunden ist, wobei die Stromquellenvorrichtung (22) eingerichtet ist, um eine periodische Erfassungsspannung an die Datenübertragungsverbindung (26) anzulegen, wobei die Stromversorgungseinrichtung (20) weiter eine Erfassungsvorrichtung (34) beinhaltet, die eingerichtet ist, um über das Anlegen der periodischen Erfassungsspannung an die Datenübertragungsverbindung (26) zu detektieren, ob die Stromsenkenvorrichtung (24) mit der Datenübertragungsverbindung (26) verbunden ist, und die Stromquellenvorrichtung (22) derart eingerichtet ist, dass in Reaktion darauf, dass die Stromsenkenvorrichtung (24) als mit der Datenübertragungsverbindung (26) verbunden erfasst wird, die Stromquellenvorrichtung (22) eine Stromversorgungspannung an die Datenübertragungsverbindung (26) anlegt, um die Stromsenkenvorrichtung (24) über die Datenübertragungsverbindung (26) derart mit elektrischem Strom zu versorgen, dass sie einen Normalbetrieb der Stromsenkenvorrichtung (24) ermöglicht,
    dadurch gekennzeichnet, dass die periodische Erfassungsspannung geringer ist als die Stromversorgungspannung.
  2. Stromversorgungseinrichtung (20) nach Anspruch 1, wobei die Erfassungsvorrichtung (34) eingerichtet ist, um über das Anlegen der periodischen Erfassungsspannung an die Datenübertragungsverbindung (26) einen charakteristischen Widerstand der Stromsenkenvorrichtung (24) zu detektieren, wenn die der Stromsenkenvorrichtung (24) mit der Datenübertragungsverbindung (26) verbunden ist.
  3. Stromversorgungseinrichtung (20) nach einem der vorstehenden Ansprüche, wobei die Stromquellenvorrichtung (22) eine Spannungskompensationsschaltung beinhaltet, die eingerichtet ist, um die Stromversorgungspannung wahlweise derart zu modifizieren, dass sie eine modifizierte Stromversorgungspannung bereitstellt, um einen Spannungsabfall auf der Datenübertragungsverbindung (26) zu kompensieren.
  4. Stromversorgungseinrichtung (20) nach Anspruch 3, wobei die Stromquellenvorrichtung (22) eingerichtet ist, um Informationen zu empfangen, die einer Länge der Datenübertragungsverbindung (26) entsprechen, und um die Informationen zu verarbeiten, um die modifizierte Stromversorgungspannung zu bestimmen.
  5. Stromversorgungseinrichtung (20) nach einem der vorstehenden Ansprüche, wobei die Stromquellenvorrichtung (22) eine Spannungsverstärkungsvorrichtung (36) beinhaltet, die eingerichtet ist, um die Stromversorgungspannung wahlweise zu verstärken.
  6. Stromversorgungseinrichtung (20) nach den Ansprüchen 3 und 5 oder nach den Ansprüchen 4 und 5, wobei die Spannungsverstärkungsvorrichtung (36) eingerichtet ist, um die Stromversorgungspannung wahlweise derart zu verstärken, dass sie die modifizierte Stromversorgungspannung bereitstellt.
  7. Stromversorgungseinrichtung (20) nach einem der vorstehenden Ansprüche, wobei die periodische Erfassungsspannung mindestens eine Größenordnung geringer ist als die Stromversorgungspannung.
  8. Stromversorgungseinrichtung (20) nach einem der vorstehenden Ansprüche, wobei die Datenübertragungsverbindung (26) eines der Folgenden ist: eine Ethernet-Datenübertragungsverbindung (26), eine RJ45-Datenübertragungsverbindung, eine USB-Datenübertragungsverbindung, eine SATA-Datenübertragungsverbindung und eine HDMI-Datenübertragungsverbindung.
  9. Stromversorgungseinrichtung (20) nach einem der vorstehenden Ansprüche, wobei die Stromquellenvorrichtung eine Schaltsteuerung ist und die Stromsenkenvorrichtung eine Mensch-Maschine-Schnittstellenvorrichtung ist.
  10. Stromversorgungseinrichtung (20) nach Anspruch 9, wobei die Schaltsteuerung eine intelligente elektronische Vorrichtung ist.
  11. Stromverteilungsnetzwerk, umfassend die Stromversorgungseinrichtung (20) nach einem der Ansprüche 1 bis 10.
  12. Stromverteilungsnetzwerk nach Anspruch 11, beinhaltend eine Nebenstationssteuerung und ein Eingangs-Ausgangs-Modul, wobei die Nebenstationssteuerung als die Stromquellenvorrichtung (22) eingerichtet ist und wobei das Eingangs-Ausgangs-Modul als die Stromsenkenvorrichtung (24) eingerichtet ist.
  13. Stromverteilungsnetzwerk nach Anspruch 12, wobei das Eingangs-Ausgangs-Modul ein verteiltes oder entferntes Eingangs-Ausgangs-Modul ist.
EP17192713.0A 2017-09-22 2017-09-22 Stromumwandlungsvorrichtung Active EP3461062B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17192713.0A EP3461062B1 (de) 2017-09-22 2017-09-22 Stromumwandlungsvorrichtung
US16/648,587 US11070393B2 (en) 2017-09-22 2018-09-07 Power delivery apparatus
PCT/EP2018/074126 WO2019057518A1 (en) 2017-09-22 2018-09-07 ENERGY DISTRIBUTION APPARATUS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17192713.0A EP3461062B1 (de) 2017-09-22 2017-09-22 Stromumwandlungsvorrichtung

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EP3461062A1 EP3461062A1 (de) 2019-03-27
EP3461062B1 true EP3461062B1 (de) 2020-02-26

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WO (1) WO2019057518A1 (de)

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US11070393B2 (en) 2021-07-20
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US20200274732A1 (en) 2020-08-27

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